Abstract #1825
Quadrifilar Helical Antenna as a Whole-Body Traveling-Wave RF Coil for 3T and 7T MRI
Branislav M. Notaros 1 , Milan M. Ilic 1 , Alexey A. Tonyushkin 2 , Nada J. Sekeljic 1 , and Pranav Athalye 1
1
Department of Electrical and Computer
Engineering, Colorado State University, Fort Collins,
Colorado, United States,
2
Radiology
Dept., Massachusetts General Hospital, Harvard Medical
School, Boston, Massachusetts, United States
We propose a novel method for traveling wave (TW) MRI at
high- and ultra-high-fields using a bore-extended,
subject-loaded helical antenna as a whole-body TW RF
coil. The helical antenna, being essentially a TW
antenna, with TW current, radiates a TW field into the
subject inside it. The novel RF coil has advantages over
patch antennas and other existing TW excitation methods
and is simultaneously a solution for a whole-body RF
coil at high fields. Our simulations of 3T and 7T MRI
systems with quadrifilar helical antenna RF coils show
TW RF magnetic field with high field-uniformity and
excellent circular polarization.
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